Fig. 3: Mechanical properties of WPU-EP, CPU-EP and SPU-EP.
From: Weaving-inspired asymmetric entangled nodes in multi-component polymer networks
a, Stress–strain curves recorded with a deformation rate of 50 mm min−1 of WPU-EP, CPU-EP and SPU-EP. b, A comparison of the mechanical properties of WPU-EP, CPU-EP and SPU-EP. c, Normalized stress relaxation curves of WPU-EP, CPU-EP and SPU-EP measured at 130 °C. d, Arrhenius plots of the stress relaxation time for WPU-EP, CPU-EP and SPU-EP samples. Dashed lines indicate a linear fit to the data. e,f, Dynamic mechanical analysis temperature sweeps of WPU-EP (e) and SPU-EP (f). g, Test schematic of oscillatory shear followed by frequency sweep to reveal the microscopic information of the topological entanglements in polymer networks. h, Moduli of WPU-EP versus the step time measured by oscillatory shear. i, Frequency sweep for WPU-EP and SPU-EP after the oscillatory shears of 0.2% and 600% to display the recovery process of the networks. j, Stress–strain curves recorded with a deformation rate of 50 mm min−1 of the demetallized WPU-EP and SPU-EP. k, Moduli at a frequency of 1.2 rad s−1 as a function of strains extracted from the frequency sweep results of the demetallized samples.
